15-Letter Words Matching _________M___R_

There are 12 15-letter words that match _________M___R_. 2 are common words, such as CARDIOPULMONARY and NONINFLAMMATORY. A rarer one is SCINTILLOMETERS. In this set, I is the most frequent open letter (12 words). 4 words contain a doubled letter.

Full list 12

cardiopulmonarynoninflammatoryactinochemistrybiogeochemistryimmunochemistryinterferometersstereochemistrythermochemistrydiffractometersgewurztraminersintervalometersscintillometers

About this list

Words
12 (2 common words)
Common example
cardiopulmonary
Rare example
scintillometers
Doubled letters
4
Ending in S
5
Most frequent letter
I (12)

Questions

How many 15-letter words matching _________m___r_ are there?

12. 2 of them are common words.

What is a common example?

CARDIOPULMONARY is among the common words in this set.